Implement FileRef GetPathPrivate interface for O3D

This is an implementation of a new private interface to get the filepath of a file downloaded with URLLoader and URLRequestInfo.SetStreamToFile(true). The file will be read in its entirety during a successful URLLoader.FinishStreamingToFile callback.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/8604006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111805 0039d316-1c4b-4281-b951-d872f2087c98

12 files changed, 156 insertions, 0 deletions

diff --git a/ppapi/api/private/ppb_file_ref_private.idl b/ppapi/api/private/ppb_file_ref_private.idl
new file mode 100644
index 0000000..7ce053a
--- /dev/null
+++ b/ppapi/api/private/ppb_file_ref_private.idl
@@ -0,0 +1,21 @@
+/* Copyright (c) 2011 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* This file contains PPB_FileRefPrivate interface. */
+
+/* PPB_FileRefPrivate interface */
+interface PPB_FileRefPrivate {
+  /**
+   * GetAbsolutePath() returns the absolute path of the file.
+   *
+   * @param[in] file_ref A <code>PP_Resource</code> corresponding to a file
+   * reference.
+   *
+   * @return A <code>PP_Var</code> containing the absolute path of the file.
+   */
+  PP_Var GetAbsolutePath([in] PP_Resource file_ref);
+};
+
+
diff --git a/ppapi/c/private/ppb_file_ref_private.h b/ppapi/c/private/ppb_file_ref_private.h
new file mode 100644
index 0000000..ea1dabe
--- /dev/null
+++ b/ppapi/c/private/ppb_file_ref_private.h
@@ -0,0 +1,42 @@
+/* Copyright (c) 2011 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef PPAPI_C_PRIVATE_PPB_FILE_REF_PRIVATE_H_
+#define PPAPI_C_PRIVATE_PPB_FILE_REF_PRIVATE_H_
+
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_var.h"
+
+#define PPB_FILEREFPRIVATE_INTERFACE_0_1 "PPB_FileRefPrivate;0.1"
+#define PPB_FILEREFPRIVATE_INTERFACE PPB_FILEREFPRIVATE_INTERFACE_0_1
+
+/**
+ * @file
+ * This file contains the <code>PPB_FileRefPrivate</code> interface.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+/* PPB_FileRefPrivate interface */
+struct PPB_FileRefPrivate {
+  /**
+   * GetAbsolutePath() returns the absolute path of the file.
+   *
+   * @param[in] file_ref A <code>PP_Resource</code> corresponding to a file
+   * reference.
+   *
+   * @return A <code>PP_Var</code> containing the absolute path of the file.
+   */
+  struct PP_Var (*GetAbsolutePath)(PP_Resource file_ref);
+};
+/**
+ * @}
+ */
+
+#endif  /* PPAPI_C_PRIVATE_PPB_FILE_REF_PRIVATE_H_ */
diff --git a/ppapi/proxy/interface_list.cc b/ppapi/proxy/interface_list.cc
index 96ee6bc..8893168 100644
--- a/ppapi/proxy/interface_list.cc
+++ b/ppapi/proxy/interface_list.cc
@@ -42,6 +42,7 @@
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppp_instance.h"
+#include "ppapi/c/private/ppb_file_ref_private.h"
 #include "ppapi/c/private/ppb_flash_clipboard.h"
 #include "ppapi/c/private/ppb_flash_file.h"
 #include "ppapi/c/private/ppb_flash_fullscreen.h"
@@ -180,6 +181,7 @@ InterfaceList::InterfaceList() {
   AddPPB(PPB_Testing_Proxy::GetInfo());
   AddPPB(PPB_URLLoader_Proxy::GetTrustedInfo());
   AddPPB(PPB_Var_Deprecated_Proxy::GetInfo());
+  AddPPB(PPB_FileRef_Proxy::GetPrivateInfo());
 
   // PPP (plugin) interfaces.
   AddPPP(PPP_Graphics3D_Proxy::GetInfo());
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index 758e040..01c8d50 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -631,6 +631,9 @@ IPC_MESSAGE_ROUTED3(PpapiHostMsg_PPBFileRef_Rename,
                     ppapi::HostResource /* file_ref */,
                     ppapi::HostResource /* new_file_ref */,
                     int /* callback_id */)
+IPC_SYNC_MESSAGE_ROUTED1_1(PpapiHostMsg_PPBFileRef_GetAbsolutePath,
+                           ppapi::HostResource /* file_ref */,
+                           ppapi::proxy::SerializedVar /* result */)
 
 // PPB_FileSystem.
 IPC_SYNC_MESSAGE_ROUTED2_1(PpapiHostMsg_PPBFileSystem_Create,
diff --git a/ppapi/proxy/ppb_file_ref_proxy.cc b/ppapi/proxy/ppb_file_ref_proxy.cc
index e6a8b94..55ef63b 100644
--- a/ppapi/proxy/ppb_file_ref_proxy.cc
+++ b/ppapi/proxy/ppb_file_ref_proxy.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_file_ref.h"
+#include "ppapi/c/private/ppb_file_ref_private.h"
 #include "ppapi/c/private/ppb_proxy_private.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/host_dispatcher.h"
@@ -42,6 +43,7 @@ class FileRef : public FileRefImpl {
   virtual int32_t Delete(PP_CompletionCallback callback) OVERRIDE;
   virtual int32_t Rename(PP_Resource new_file_ref,
                          PP_CompletionCallback callback) OVERRIDE;
+  virtual PP_Var GetAbsolutePath() OVERRIDE;
 
   // Executes the pending callback with the given ID. See pending_callbacks_.
   void ExecuteCallback(int callback_id, int32_t result);
@@ -144,6 +146,13 @@ int32_t FileRef::Rename(PP_Resource new_file_ref,
   return PP_OK_COMPLETIONPENDING;
 }
 
+PP_Var FileRef::GetAbsolutePath() {
+  ReceiveSerializedVarReturnValue result;
+  GetDispatcher()->Send(new PpapiHostMsg_PPBFileRef_GetAbsolutePath(
+      API_ID_PPB_FILE_REF, host_resource(), &result));
+  return result.Return(GetDispatcher());
+}
+
 void FileRef::ExecuteCallback(int callback_id, int32_t result) {
   PendingCallbackMap::iterator found = pending_callbacks_.find(callback_id);
   if (found == pending_callbacks_.end()) {
@@ -171,6 +180,14 @@ int FileRef::SendCallback(PP_CompletionCallback callback) {
   return next_callback_id_++;
 }
 
+namespace {
+
+InterfaceProxy* CreateFileRefProxy(Dispatcher* dispatcher) {
+  return new PPB_FileRef_Proxy(dispatcher);
+}
+
+}  // namespace
+
 PPB_FileRef_Proxy::PPB_FileRef_Proxy(Dispatcher* dispatcher)
     : InterfaceProxy(dispatcher),
       callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
@@ -180,6 +197,18 @@ PPB_FileRef_Proxy::~PPB_FileRef_Proxy() {
 }
 
 // static
+const InterfaceProxy::Info* PPB_FileRef_Proxy::GetPrivateInfo() {
+  static const Info info = {
+    thunk::GetPPB_FileRefPrivate_Thunk(),
+    PPB_FILEREFPRIVATE_INTERFACE,
+    API_ID_NONE,  // URL_LOADER is the canonical one.
+    false,
+    &CreateFileRefProxy
+  };
+  return &info;
+}
+
+// static
 PP_Resource PPB_FileRef_Proxy::CreateProxyResource(PP_Resource file_system,
                                                    const char* path) {
   Resource* file_system_object =
@@ -205,6 +234,8 @@ bool PPB_FileRef_Proxy::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileRef_Touch, OnMsgTouch)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileRef_Delete, OnMsgDelete)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileRef_Rename, OnMsgRename)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFileRef_GetAbsolutePath,
+                        OnMsgGetAbsolutePath)
 
     IPC_MESSAGE_HANDLER(PpapiMsg_PPBFileRef_CallbackComplete,
                         OnMsgCallbackComplete)
@@ -294,6 +325,13 @@ void PPB_FileRef_Proxy::OnMsgRename(const HostResource& file_ref,
   }
 }
 
+void PPB_FileRef_Proxy::OnMsgGetAbsolutePath(const HostResource& host_resource,
+                                             SerializedVarReturnValue result) {
+  EnterHostFromHostResource<PPB_FileRef_API> enter(host_resource);
+  if (enter.succeeded())
+    result.Return(dispatcher(), enter.object()->GetAbsolutePath());
+}
+
 void PPB_FileRef_Proxy::OnMsgCallbackComplete(
     const HostResource& host_resource,
     int callback_id,
diff --git a/ppapi/proxy/ppb_file_ref_proxy.h b/ppapi/proxy/ppb_file_ref_proxy.h
index 83fee18..200d7cf 100644
--- a/ppapi/proxy/ppb_file_ref_proxy.h
+++ b/ppapi/proxy/ppb_file_ref_proxy.h
@@ -22,11 +22,15 @@ struct PPB_FileRef_CreateInfo;
 
 namespace proxy {
 
+class SerializedVarReturnValue;
+
 class PPB_FileRef_Proxy : public InterfaceProxy {
  public:
   explicit PPB_FileRef_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_FileRef_Proxy();
 
+  static const Info* GetPrivateInfo();
+
   static PP_Resource CreateProxyResource(PP_Resource file_system,
                                          const char* path);
 
@@ -76,6 +80,8 @@ class PPB_FileRef_Proxy : public InterfaceProxy {
   void OnMsgRename(const HostResource& file_ref,
                    const HostResource& new_file_ref,
                    int callback_id);
+  void OnMsgGetAbsolutePath(const HostResource& host_resource,
+                            SerializedVarReturnValue result);
 
   // Host -> Plugin message handlers.
   void OnMsgCallbackComplete(const HostResource& host_resource,
diff --git a/ppapi/shared_impl/file_ref_impl.h b/ppapi/shared_impl/file_ref_impl.h
index 3f4bf8f..58ee0fe 100644
--- a/ppapi/shared_impl/file_ref_impl.h
+++ b/ppapi/shared_impl/file_ref_impl.h
@@ -47,6 +47,7 @@ class PPAPI_SHARED_EXPORT FileRefImpl : public Resource,
   virtual PP_Var GetName() const OVERRIDE;
   virtual PP_Var GetPath() const OVERRIDE;
   virtual const PPB_FileRef_CreateInfo& GetCreateInfo() const OVERRIDE;
+  virtual PP_Var GetAbsolutePath() = 0;
 
  private:
   PPB_FileRef_CreateInfo create_info_;
diff --git a/ppapi/thunk/ppb_file_ref_api.h b/ppapi/thunk/ppb_file_ref_api.h
index ddcae7c..ca74003 100644
--- a/ppapi/thunk/ppb_file_ref_api.h
+++ b/ppapi/thunk/ppb_file_ref_api.h
@@ -34,6 +34,9 @@ class PPAPI_THUNK_EXPORT PPB_FileRef_API {
   // Intermal function for use in proxying. Returns the internal CreateInfo
   // (the contained resource does not carry a ref on behalf of the caller).
   virtual const PPB_FileRef_CreateInfo& GetCreateInfo() const = 0;
+
+  // Private API
+  virtual PP_Var GetAbsolutePath() = 0;
 };
 
 }  // namespace thunk
diff --git a/ppapi/thunk/ppb_file_ref_thunk.cc b/ppapi/thunk/ppb_file_ref_thunk.cc
index 542a7c7..5041c55 100644
--- a/ppapi/thunk/ppb_file_ref_thunk.cc
+++ b/ppapi/thunk/ppb_file_ref_thunk.cc
@@ -6,6 +6,7 @@
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_file_ref_private.h"
 #include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
@@ -98,6 +99,13 @@ int32_t Rename(PP_Resource file_ref,
   return MayForceCallback(callback, result);
 }
 
+PP_Var GetAbsolutePath(PP_Resource file_ref) {
+  EnterResource<PPB_FileRef_API> enter(file_ref, true);
+  if (enter.failed())
+    return PP_MakeUndefined();
+  return enter.object()->GetAbsolutePath();
+}
+
 const PPB_FileRef g_ppb_file_ref_thunk = {
   &Create,
   &IsFileRef,
@@ -111,11 +119,19 @@ const PPB_FileRef g_ppb_file_ref_thunk = {
   &Rename
 };
 
+const PPB_FileRefPrivate g_ppb_file_ref_private_thunk = {
+  &GetAbsolutePath
+};
+
 }  // namespace
 
 const PPB_FileRef* GetPPB_FileRef_Thunk() {
   return &g_ppb_file_ref_thunk;
 }
 
+const PPB_FileRefPrivate* GetPPB_FileRefPrivate_Thunk() {
+  return &g_ppb_file_ref_private_thunk;
+}
+
 }  // namespace thunk
 }  // namespace ppapi
diff --git a/ppapi/thunk/thunk.h b/ppapi/thunk/thunk.h
index 5f6a62c..5fb38b4 100644
--- a/ppapi/thunk/thunk.h
+++ b/ppapi/thunk/thunk.h
@@ -34,6 +34,7 @@ struct PPB_BufferTrusted;
 struct PPB_Context3DTrusted_Dev;
 struct PPB_FileChooserTrusted;
 struct PPB_FileIOTrusted;
+struct PPB_FileRefPrivate;
 struct PPB_Flash_Clipboard;
 struct PPB_Flash_Menu;
 struct PPB_Flash_NetConnector;
@@ -63,6 +64,7 @@ PPAPI_THUNK_EXPORT const PPB_Context3DTrusted_Dev*
 PPAPI_THUNK_EXPORT const PPB_FileChooserTrusted*
     GetPPB_FileChooser_Trusted_Thunk();
 PPAPI_THUNK_EXPORT const PPB_FileIOTrusted* GetPPB_FileIOTrusted_Thunk();
+PPAPI_THUNK_EXPORT const PPB_FileRefPrivate* GetPPB_FileRefPrivate_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_Clipboard* GetPPB_Flash_Clipboard_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_Menu* GetPPB_Flash_Menu_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_NetConnector*
diff --git a/webkit/plugins/ppapi/ppb_file_ref_impl.cc b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
index 673ec01..3b39ce6 100644
--- a/webkit/plugins/ppapi/ppb_file_ref_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
@@ -244,6 +244,20 @@ int32_t PPB_FileRef_Impl::Rename(PP_Resource new_pp_file_ref,
   return PP_OK_COMPLETIONPENDING;
 }
 
+PP_Var PPB_FileRef_Impl::GetAbsolutePath() {
+  if (GetFileSystemType() != PP_FILESYSTEMTYPE_EXTERNAL)
+    return GetPath();
+  if (!external_path_var_.get()) {
+    PluginModule* plugin_module = ResourceHelper::GetPluginModule(this);
+    if (!plugin_module)
+      return PP_MakeNull();
+    external_path_var_ = new StringVar(
+        plugin_module->pp_module(),
+        external_file_system_path_.AsUTF8Unsafe());
+  }
+  return external_path_var_->GetPPVar();
+}
+
 FilePath PPB_FileRef_Impl::GetSystemPath() const {
   if (GetFileSystemType() != PP_FILESYSTEMTYPE_EXTERNAL) {
     NOTREACHED();
diff --git a/webkit/plugins/ppapi/ppb_file_ref_impl.h b/webkit/plugins/ppapi/ppb_file_ref_impl.h
index 64926de..39bc80b 100644
--- a/webkit/plugins/ppapi/ppb_file_ref_impl.h
+++ b/webkit/plugins/ppapi/ppb_file_ref_impl.h
@@ -11,10 +11,13 @@
 #include "googleurl/src/gurl.h"
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/shared_impl/file_ref_impl.h"
+#include "ppapi/shared_impl/var.h"
 
 namespace webkit {
 namespace ppapi {
 
+using ::ppapi::StringVar;
+
 class PPB_FileSystem_Impl;
 
 class PPB_FileRef_Impl : public ::ppapi::FileRefImpl {
@@ -43,6 +46,7 @@ class PPB_FileRef_Impl : public ::ppapi::FileRefImpl {
   virtual int32_t Delete(PP_CompletionCallback callback) OVERRIDE;
   virtual int32_t Rename(PP_Resource new_file_ref,
                          PP_CompletionCallback callback) OVERRIDE;
+  virtual PP_Var GetAbsolutePath();
 
   PPB_FileSystem_Impl* file_system() const { return file_system_.get(); }
 
@@ -67,6 +71,10 @@ class PPB_FileRef_Impl : public ::ppapi::FileRefImpl {
   // Used only for external filesystems.
   FilePath external_file_system_path_;
 
+  // Lazily initialized var created from the external path. This is so we can
+  // return the identical string object every time it is requested.
+  scoped_refptr<StringVar> external_path_var_;
+
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Impl);
 };